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SIMATIC S7-400 SM 421, DI 16x24/60 V UC
SKU: 6ES7421-7DH00-0AB0
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Short Description
Description:
SIMATIC S7-400 with digital input (SM 421), isolated 16 DI, UC 24-60 V, alarm, and diagnostics.
Input current:
From backplane bus 5 V DC, max.: 150 mA.
Power loss:
Power loss, typ.: 8 W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC).
Digital inputs:
Number of digital inputs: 16.
Number of simultaneously controllable inputs:
Number of simultaneously controllable inputs: 16.
Input voltage:
Type of input voltage: AC/DC.
Rated value (UC): 24 V; 24 V UC to 60 V UC (47 ... 63 Hz).
for signal "0": -6 to +6 V DC/ 0 to 5 V AC.
for signal "1": 15 to 72 V DC; -15 to -72 V DC; 15 to 60 V AC.
Input current:
for signal "1", typ.: 4 mA; 4 to 10 mA.
Input delay (for rated value of input voltage):
for standard inputs:
Parameterizable: Yes.
Rated value: 0.5 ms; 0.5 / 3 / 10 / 20 ms.
Encoder connection:
Fixed current limitation for wire-break monitoring, min.: 18 kΩ; 18 kohms: Rated voltage 24 V (15 to 35 V); 39 kohms: Rated voltage 48 V (30 to 60 V).
Fixed current limitation for wire-break monitoring, max.: 56 kΩ; Rated voltage 60 V (50 to 72 V).
Cable length:
shielded, max.: 1 000 m.
unshielded, max.: 600 m; 600 m: 3, 10, 20 ms; 100 m: 0,5 ms.
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Encoder:
Connectable encoders:
2-wire sensor: Yes.
Permissible quiescent current (2-wire sensor), max.: 0.5 mA; 0.5 to 2 mA.
Interrupts/diagnostics/status information:
Diagnostics function: Yes; Parameterizable.
Alarms:
Diagnostic alarm: Yes; Parameterizable.
Hardware interrupt: Yes; Parameterizable.
Diagnoses:
Diagnostic information readable: Yes; possible.
Wire-break: Yes; I> 0.7 mA.
Diagnostics indication LED:
Status indicator digital input (green): Yes.
Channel fault indicator F (red): No.
Potential separation:
Potential separation digital inputs:
Between the channels: Yes.
Between the channels, in groups of: 1.
Between the channels and backplane bus: Yes.
Isolation:
Isolation tested with: 1500 V AC.
Dimensions:
Width: 25 mm.
Height: 290 mm.
Depth: 210 mm.
Weights:
Weight, approx.: 600 g.